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Old 07-19-21, 06:45 AM
Joint Venture
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“Grinding” makes me think of bearings too. There really are just three places that bearings would grind while pedaling: the front/rear BB’s and the intermediate shaft. Using the suggestions above it should not be hard to isolate the source(s). With the amount of wear you had on the rest of the drivetrain, it’s easy to think any of those bearings might need attention or replacement.
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